Harrow.



C. E. WHITE.

HARROW.

APPLICATION FILED FEB.4.1909- RENEWED SEPT.30, 191s.

Patented May 15, 1917.

3 SHEETSSHEET 1.

2/96 b1 zoom L. L. WHITE.

HARROW. I APPLICATION FILED FEB. 4, 1999. RENEWED SEPT. 30. 1916.1,225,904.

3 SHEETS-SHEET 2.

Patented May 15, 1917.

aummtoz witness v 1 I I C. E. WHITE.

HARROW. APPLICATION FILED FEB- 4.1909- RENEWED SEPT-30. 1916 1,225,904.Patented May15, 1917.

3 SHEETS-SHEET 3.

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Specification of Letters Patent.

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Patented May 15, 1917'.

Application .mstrebmar 4, 1909, Serial in. 476,068. Renewed Septemberso, 1916. f Serial No.-123,19 4.

To ell whom it may concern Be it known that I, CHARLESE. WHITE,

a citizen of the United States, residing at ,Moline, in the county'ofRock Island. and

State ofylllinois, have invented certain new and useful ImprovementsinHarro'ws, of which the following is a specification, refer.

.ence losing .had therein to theaccompany- ..in drawing. I

. his invention relates more particularly totheclassof disk harrows,that is, harrows qin which use'is made of gangs of disks, or similartools, oppositely arranged 1n rela-' tion to a rnain'or draft franiearranged at tl1e'.l,0hgitlldimtl center of the machine.

"Theprincipalobjectsof the invention are 'to improve the devices forconnecting the gang frames to the drafit' fra1ne,-the construction ofthe gang frames and t. means for. controlling the scraper 'bars whichare employed for cleaning the concave surfaces of the disks. f

The nature of the various objects; of the invention and the manner ofattaining them will be readily understood from thefollowing descriptionin connection with the accompanying drawings which illustrate a.

preferred form of the, invention.

v the locking device of one of the foot levers, the. section being takenon the line C-. D of. Fig. 2.

Figure 1 is a plan view of the implement. F 2 is a left end elevation ofthe same. Fig. 3 is a sectional viewof the implement, the section beingtaken on the line A-.B in Fig. 1. i i

Fig. 4 is a fragmentary viewshowingin rear elevation the adjustableabutment plate which cooperates with the draft bars.

Fig. 5 is a detail sectional view showing Fig. (l is a fragmentaryelevation of the said locking device.

Fig. 7 is a detail view showing in per-spec tive one of the cam leversfor effecting longitudinal movement of. the scraper bars.

Fig. 8

' shown in Fig. 7.

Fig; 9 is a plan vlew showing the main parts of the draft frame and thelower parts of the gang frames in their respective extreme positions ofangular ed ustment.

1s a side elevationof the parts The implement, as illustrated, comprisesa draftframe A and the two tool gangs B and C together with means foroperatively connecting the said frame and gangs. I p

The draft frame comprises a pole or tongue 1, atransverse bar 2 rigidlysecured to the rear end of the pole by means of a casting 3 and havingits ends extending downwardlyand rearwardly as at 2 and? to connect Withthetool gangs, and the diagonal bars 4: and 5 which are secured at theirfront ends to the pole and at their rear with rip-standing flanges 9 towhich are bolted the up-right bars 10. To the two upstanding bars ofeachgang is secured a rectangular frame comprising front and rear bars11 and 12 extendinglongitudinally or" thegang and the transverse bars13. The 1 ends of these transverse bars are bent at right angles. andsecurely bolted to the bars 11 and12. Each of the lip-right bars 10 hasits upper end disposed in the angle formed by the bar 11 and one ofthetransverse bars,

and is securely bolted to the latter. In

clined brace bars 14 extend from the uprights 10 to the transverse bars13 to add stifiness to the structure.

In this construction the number of parts is reduced to a minimum, asingle bolt serving to connect eitherend of the transverse .bar to alongitudinal bar, and a second bolt serving to connect the upright bar1.0 to the transverse bar. At the'same time the structure is very rigidby reason of the manner in which the parts'are assembled, for it will beseen that by disposing the upper ends of the up-rights 1G in the angleformed by the bars -11 and 13 there is a mutual bracing action betweenthe parts. There is notendarmy of the transverse bars 13 to turn upontheir securing bolts by reason of the stahiling flanges 9" which are inthe case of the ity of the axially united tool disks and the rigidconnection therewith of the up-rights 10. Furthermore, this framestructure is composed entirely of wrought material and is not onlysimpler but lighter in weight than former constructions in which thetransverse parts were in the form of cash ings, or in which castingswere employed to connect the up-rights to the rectangular frame part.

Each of the bearing boxes is provided with an oil tube 15 which extendsupward adjacent the up-right bar 10 to the level of.

the rectangular part of the gang frame.

bearing forwardly projectspaced apart to reof the transverse bar 2,outside bearing boxes, and therear ends of draft bars 16, in the case ofthe inner bearing boxes. The flanges 9 of the out-side bearing boxes areformed with slots through which pass the securing bolts 17 whichpivotally unite the said outside bearing boxes to the parts 2 and 2",thus forming a. direct pivotal connection between the gangs and therigid draft frame. Bolts 18 serve to pivotally connect the inner bearingboxes to the draft bars 16. Brace bars 19, which are'secured at theirlower ends to the transverse bar 2 of the draft frame and at their upperends to the adjacent'up-rights 10 of the gang frames, serve to hold thelatter in suitable up-righ't position.

The forward ends of the draft bars 16 are pivotally connected to thelower ends of the hand-levers 20 by means of which the bars may be movedbackward 01 forhe upper and lower parts of the boxes are formed withceive the parts 2, 2

ward tovary the angularity of the tool gangs. Each hand lever isprovided with a notched segment 21 wh ch, in connection with the usuallocking bolt, serves to hold the lever in adjusted position.

clamped against the Each of the gang frames carries at itsinner end abumper 22. These bumpers are in the form of large flat disks and areinner disks of the respective gangs by the gang bolts in the well knownway. These bumper disks are designed to engage each other in all theangular positions of the gang frames. and by making them of largediameter, it is possible to make them relatively fiat and thin and stillmaintain them in proper engagement even when the gang frames areadjusted to positions of extreme angularity with respect to the line ofdraft. By makin,g the bumpers thin and fiat the gangs are not forcedapart to the extent they otherwise. would be when the gang frames areadjusted forward to positions of least angularity, and the leaving of aridge of unworked soil between the inner disks of the two gangs isavoided.

, which the bumpers will-not serve this justmcnt of ti In Fig. 9 of thedrawing, the tool gangs are shown at the maximum angle, with respect tothe lines of draft, to which they are commonly set in normal 0 ration.The parts are so related that w en the gangs are in this position thepivot bolts 17 are near the outer ends of their slots in the bearingboxes 9, the thrust of the gangs due to the inward component of theearths reaction on the disks being taken by the umpers 22. As the innerends of the gun are drawn forward by means of the hand levers toward thepositions shown in dotted lines, the bumpers remain in engagement sothat the pivotal movement of the gan is necessarily accompanied by an enwise movement. Such cndwise movement is )!o vided for because thebearing boxes are ree, by reason of their slots, to slip outward on thepivot bolts 17.

.With this construction it is clear that the inward thrust ofeachcounteracted by that of the other gu of stresses due to such end thrustof the gangs and the gang bearin are not subjected to the heavy wear tat is incident to the transmission of such st in those priorconstructions in which the end thrust of the gangs is taken by the draftframe. The draft frame, however, is made stron enough to take suchstresses so that it wifi be possible, under certain circumstances, asfor example, when working one side hill, to set one gang at a differentanglethan the other. When this is done, it is clear that, if the bumpersare moved out of engagement, the gangs will crowd inward bringing theouter ends of the slots in the bearing boxes 9 into engagement withpivot bolts 17 so that the thrust of the gangs is taken directly by thedraft frame. Probably in the majority of cases of this sort it will notbe necessary to angles dill'ering from each of operative engagement/witheach other, because saidv bumpers, n5 stated, are of relatively largediameter and peculiarly shaped. It will be seen, nevertheless, that myimproved construction, while itprovidcs for the taking of the end thrustdf the gangs by each other under most conditions of operation, alsoprovides for the taking the draft frame in the exceptional cases infunction. Thus in my improved harrow I secure all the advantages of therigid dra-ft frame having a direct pivotal connection with the gangs andof the independent ad- 19 gangs relative to each other, withoutsubjecting the draftframe to the heavy stresses or the gang bearings tothe heavy wear incident the gangs, except in rare or extreme cases.

of such thrusts on set the gangs at to the end thrust of' outward farenough to release the scrapers, and locking it against movement inwardunder the action ofthe gpring 34. 42 is a plate pivotall mounte on thebearin racket 29 an having a cam face 42 an handle part 42". Thecam partof this plate is arranged to engage the adjacent end of the rock shaft26, and is so shaped as to force the shaft and with it the scrapersoutward whei the handle part 42 is thrown upward. If it is desired tohold the rock shaft in this outward position the movement of the plate42 is carried far enough to bring the plain part 42 in engagement withthe end of the shaft and thereby lock-the latter in its position. Whenthe shaft is thus held by the cam plate the scrapers, if in their normalposition near the axis of the disks, are held out of contact with thesaid disks; at the same time the scrapers are free to OS- cillate, asbefore, under the action of the foot lever 35 and spring 34, but theynow swing in planes and out of contact with the disk until they approachthe peripheral parts thereof when they come into operative engagement.

lVhat I claim is:

1. In a disk harrow, the combination of a draft frame, two oppositelyarranged gang frames having their inner end parts vibrata'ble verticallyand horizontall and independently movable longitudinal y, means forpreventing the inner end of either gang from rising above horizontallines predetermined relatively to the other gang, draft connections,with the draft frame permitting all of the said movements of the diskgangs, and abutting devices for the inner ends of the gang framesadapted to constantly inter-engage, each abutting device being a widelyextended flattened boss having a convex operative surface which at,itsedge fits closely to the convex surface of the innermost disk of a gangthe central part being relatively flattened and the peripheral partbeing described with a radius approximating but slightly less than theradius of the convexity of the disk whereby the abutment bosses arerelatively thin at the axial lines but are relatively wide in verticalplanes and are adapted to abut constantly against each otherindependently of the disks irrespective of the angle of the gangs topermit each other to bodily slip radially while they are abutting;

2. In an implement of the class set forth, the combination of the draftframe, the gang frames pivotally connected to the draft frame, thecurved draft bars each having a relatively downward curved rear endportion and connected at its rear end to the inner end of one of thegang frames, the hand levers pivotally mounted on the draft frames andconnected to the forward ends of the said draft bars, and the verticallyadformed by the limit of the upward movement of the inner ends of thegangs remains constant for all positions of the draft bars when they areadjusted backward and forward.

3. The combination of the axle, the spaced disks thereon, the uprightbars or standards carried by the axle and disks, and the rectangularframe secured to the standards above the disks, said frame comprisingfront and rear bars arranged longitudinally of the disk axis, andtransverse bars connecting the longitudinal bars, the upright bars beingdisposed in the angles formed by the longitudinal and transverse barsand ing bolted to the latter.

4. The combination of the series of disks and interposed spacing spools,means for securing the disks and spools together on a common axis, thebearing boxes mounted on the spacing spools, the upright bars orstandards rigidly secured to the bearing boxes, and the rectangularframe secured to the standards above the disks, said frame comprisingfront and rear bars arranged longitudinally of the disk axis, andtransverse bars having their ends bent at right angles and bolted to theinner faces of the longitudinal bars, the upright bars being disposed inthe angles formed by the longitudinal and transverse bars and beingbolted to the latter.

5. The combination of the axle, the spaced disks thereon, the uprightbars or standards carried by the axle and disks, and the rectangularframe secured to the standards above the disks, said frame comprisingfront and rear bars arranged longitudinally of the disk axis, andtransverse bars having their ends bent at right angles and bolted to thelongitudinal bars, the upright bars being disposed in the angles formedby the longitudinal and transverse bars and being'bolted to one of saidbars and braces connecting the vertical and transverse bars.

6. The combination of the axle, the spaced disks thereon, the uprightbars or standards carried by the axle and disks, and the rec- 'tangular'frame secured to the standards and rear bars arranged longitudinally ofthe,

disk axis, and transverse bars having their ends bent at right anglesand bolted to the inner faces of the longitudinal bars, the upright barsbeing disposed in the angles the longitudinal and transverse bars andbein bolted to the latter.

7 The com ination of the axle, the spaced disks thereon, the uprightbars or standards carried by the axle and disks, and the rectangularframe secured to the standards above the disks, saidframe comprisingfront and rear bars arranged longitudinally of the disk axis, andtransverse bars having their ends bent. at right angles and bolted tothe longitudinal bars, the upright bars being disposed in the anglesformed by the longitudinal and transverse bars and being bolted to oneof said bars.

In testimony whereof I affix my signature, in presence of two witnesses.

- I CHARLES E. WHITE.

Witnesses: OSCAR F. LUNDAHL, J. H. BUSHONG.

